Poweb-handsaw



E. C. BUELL AND H.'L. STEENR OD.

POWER HANDSAW.

APPLICATION FILED 0CT.13| 1916- RENEWED AUG. 4, 1919.

Patented Dec. 9, 1919.

m x d e W W U m m xm WL m 0 10 21.? %N J W UNITED STATES P T T EDWIN 0. sum m mnnnan 1.. summon. or remain uio'rnean.

mime... a gamma.

'. rownn-mnsnw.

Application illed October is, me, Serial-No. 125,L8 8 3.enewed mm 4, an; Ba i-uric. 315,848.

To all'whbm it may mm; 1 I Be it known that we,'EnwI'N 0: Burma and Hmsnnx L'. STEENROD, citizens ofthe'United States of America, residing at Detroit, in the county of .Wayne and State of Michigan,.

- have invented certainnew and useful Im 'provements in Power-Handsaws, of which f the following is a'specification, reference being had therein toithe accompanyingdrawd his invention relates to a power hand saw and the primary object of our invention is to provide an electrically driven hand saw that may be safely manipulated and eas1ly con trolled.

Another obJect of our'mvention 15' to pro. vide a saw resembllng a butchers saw or hack saw with a. novel guide in which the a saw may be reciprocated and a power plant on the guide for imparting movement to the saw.

A further object of our invention is to accomplish the above results by a simple, durable and inexpensive construction which will be hereinafter specifically described and then claimed.

Reference will now be had to the drawing wherein- Figure 1 is a side elevation of the saw in accordance with our invention; I

Fi 2 is a'cross sectional view taken on the line II--II of Fig. 1; Fig. 3 is a similar view taken on the line III-III of Fig. 1; and

Fi 4 is a detail sectional view of an ad-. justa le wrist pin adapted to form partof the saw.

- In the drawing 1 denotes a channel or iii-' verted U-shaped guide and mounted inthe inner end thereof by screws 2 or other fastoning means is a flat handle iece. 3 having the lower edge thereof provi ed with a tubular guide 4. g

I Slidable in the outer portion of the guide 1 is a saw frame or yoke 5 having a detach-* able and adjustable blade 6. The rear end of the saw frame 5 is provided with a rearwardly extending rod 7 slidable in the ide 4 and cooperating with the guide 4 (in olding the saw frame relative to the guide -1) are angle clips 8 held by set screws 9, said angle clips extending under the guide 1' as best shown in Fig. 3, to serve as supports for the saw frame as it is reciprocated within the guide 1.

'the periphery of said wheel.

boss 11 for a journal pin 12. 'Rotatable on posed slot/14 inverted T-shaped incross section, as-shown in Fig. A. Slidable iii the slot 14 is the head 15 of a wrist in 16 and said wrist pin is adapted to be the gea'r'wheel13 by a wing thumb nut 17 mounted on the wrist pin.

L0ose on the wrist in 16 is a mnnecting" rod or pitnian l8, sai connecting-rod hava se ted Dec. 9.1919.

. handle piece 3 lias rhandle proper 10 andpne side of saidhandle piece has a ed relative to ing the end thereof (pivotally connected,- as

at 19 to the inner en of the saw frame 5.

Mounted on the inner end of the guide 1 isa bracket 20 supporting a vertically disposed electric inotor 21. This motor has suitable lead-in wires 22 so that itmay be operated from a suitable source of electrical energy, for instance an ordinary lighting circuit. The motor has the armature shaft 23 thereof vertically disposed .to extend downwardly at the side of the handle iece 3 and the lower end of said armature s aft is journaled in a suitable bearing 24 carriedby the handle piece. Mounted on .the shaft 23 is a worm 25 meshing with the gear wheel 13 so that said gear wheel will be revolved and the saw frame reciprocated when the I electric motor 21 is placed in operation.

To control the'operation of the electric motor, the handle 10 has a suitable switches on and o push buttons 26 connected to the motor by wires 27, thus permitting of the motor being started and stopped at will.

From the foregoing it will be observed that the saw frame 5 and the blade 6 are of a conventional type andthat the rod 7 is substituted for the usual handle. It is then possible to place the frame 5 in our saw guide and reciprocate the same, while the saw is guided and proper pressure brought to bear atthe handle 10. The stroke of the sawframe 5 may be easily regulated by adjusting the wrist in 16, either, toward the Journal pin 12 of the gear wheel One embodiment of our invention has been illustrated, but we desire itto be "understood thatthe structural elements are susceptible to such changes as fall within the scope of the appended claim.

13 ortoward What we claim is Q In testimony whereof we afiix our signa- In a power hand saw, the combinatlon tures in presence of two witnesses. with a saw, and means adapted for recipro- EDWIN C 'BUELL eating said saw of a channel guide for said 5saw, and angle clips oonnected to one side HILBERN D' of said channel guides and extending under Witnesses: said channel guides to retain said saw ANNA M. Donn, therein. KARL H. BUTLER. 

